<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
// 			var arr = [];
// 			arr.push(1);
// 			console.log(arr);
			
			fn(1,2);
			fn(1,2,3);
			fn(1,2,3,4,5);
			function fn(a,b){
				arguments[0] = 0
				console.log(arguments);
				// arguments.push(1);
				console.log(arguments instanceof Array);
				
				console.log(fn.length);
				console.log(arguments.length);
				
				// arguments.callee
				
				console.log(arguments.callee);
			}
		</script>
	</body>
</html>
